| Ontario to Tacoma (Washington) | 946.53 mi (1,523.29 km) |
| Ontario to Tahlequah (Oklahoma) | 1,284.79 mi (2,067.66 km) |
| Ontario to Takoma Park (Maryland) | 2,261.71 mi (3,639.86 km) |
| Ontario to Talladega (Alabama) | 1,803.67 mi (2,902.73 km) |
| Ontario to Tallahassee (Florida) | 1,956.07 mi (3,147.99 km) |
| Ontario to Tallmadge (Ohio) | 2,025.23 mi (3,259.29 km) |
| Ontario to Tamalpais-Homestead Valley (California) | 382.60 mi (615.73 km) |
| Ontario to Tamarac (Florida) | 2,283.55 mi (3,675.01 km) |
| Ontario to Tamiami (Florida) | 2,287.32 mi (3,681.09 km) |
| Ontario to Tampa (Florida) | 2,112.81 mi (3,400.24 km) |
| Ontario to Tanaina (Alaska) | 2,364.04 mi (3,804.55 km) |
| Ontario to Tanque Verde (Arizona) | 415.29 mi (668.35 km) |
| Ontario to Tarboro (North Carolina) | 2,255.32 mi (3,629.59 km) |
| Ontario to Tarpon Springs (Florida) | 2,090.95 mi (3,365.06 km) |
| Ontario to Tarrytown (New York) | 2,418.54 mi (3,892.26 km) |
